Will hi-res music I bought from HD Tracks and loaded into my iTunes play in lossless format through Apple music?

Hello brucefromcottage grove,

We see you have a question regarding lossless audio, and we'd be happy to help.

You can find the available helpful information on that topic here: About lossless audio in Apple Music

The song may need to be available from the Apple Music catalog in order to listen to it in the lossless format. Then you'll be able to stream/download it from your library once you've obtained it from there.

Cheers.